Recover personal files from hard drive using USB enclosure.

My friend has been using AutoCAD on fairly new Windows 10 install. No problems till today when he got an error stating he needed to reinstall the OS. I didn't see the error before he shut down. To be safe he pulled his hard drive and asked me to backup his personal files using a USB enclosure, before reinstalling OS.No problem right? I've done this for other people many times in older OSs, but this is the first time I've seen Windows 10 file structure. I plugged in the drive and found that I can't access files in the OS partition. I can't crack it. Basically, it can't get the rights to see files there. I actually plugged the enclosure into an old XP computer I had laying around and was able to see some folders and files, but no personal files.
Can any of you help me understand where his files are located on the drive and how I can access them?
Thanks!

Hi W10 is pretty new . Have you thought about using Linux OS to recover the data!
https://www.winhelp.us/recover-files...ppy-linux.html

I did discover that my problems stemmed from a rights issue. I had not given myself access to the OS partition.

I found this article: Failed To Enumerate Objects In The Container
and made the changes I needed and now it appears to be working.

Thanks anyway for your help.

Your welcome! Thanks for posting your solution. I'm sure it will help other members!